Engine Cooling problem
1996 Toyota 4Runner 6 cyl Four Wheel Drive Automatic 217 miles
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the car has no leaks, no major problems. when iam idle the car does not overheat. only when i drive. i flushed radiator and put new coolant and it still overheats. when i flushed it, brown stuff came out. i put one gallon of antifreeze/coolant in and filled the coolant tank with water. i have no idea whats going on.